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Light based positioning

A light source and ground-based technology, applied in positioning, using optical devices, and beacon systems using electromagnetic waves, etc., can solve the problems of unpredictable radio waves, positioning solutions that cannot meet requirements, and limiting the accuracy of positioning systems

Inactive Publication Date: 2017-04-19
MICROSOFT TECH LICENSING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While WiFi-based positioning solutions can be deployed and used at relatively low cost, they only provide accuracy up to a few meters due to wireless channel dynamics, fading, interference, and environmental noise
For example, complex indoor environments cause radio waves to propagate in dynamic and unpredictable ways, which limits the accuracy of such positioning systems
As a result, positioning solutions based on wireless communication cannot meet the requirements of many applications

Method used

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Examples

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Embodiment Construction

[0016] The subject matter described herein will now be described with reference to several example embodiments. It should be understood that these embodiments are discussed merely to enable those skilled in the art to better understand and thus practice the subject matter described herein, and not to suggest any limitation on the scope of the subject matter.

[0017] As used herein, the term "including" and its variations are to be understood as open-ended terms meaning "including, but not limited to." The term "or" is to be read as "and / or" unless expressly stated otherwise. The term "based on" is to be understood as based at least in part on. The terms "one embodiment" and "an embodiment" are to be read as "at least one embodiment." The term "another embodiment" is to be understood as "at least one other embodiment". Other definitions, express or implied, may be included below.

[0018] figure 1 Illustrated is a block diagram of a device 100 in accordance with one embod...

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PUM

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Abstract

A method relates to light based positioning is provided. The method comprises: responsive to receiving a light signal from at least one light source (200) available to the device (100), decoding a beacon from the received light signal, the beacon associated with the at least one light source (200); measuring signal strength of the received light signal; and determining a position of the device (100) at least in part based on the decoded beacon, the measured signal strength, and number of the at least one light source (200). In addition, the frequency channelization and random channel hopping may be utilized to further improve the performance.

Description

Background technique [0001] Location-based services have been applied in various scenarios for which accurate positioning is a key issue. Satellite-based positioning services such as the Global Positioning System (GPS) and the Galileo system can provide accurate positioning of target objects in outdoor environments. However, such satellite-based solutions cannot be applied to indoor positioning, as is known. As an example, GPS loses most of its power when passing through building materials and suffers from multipath propagation effects, which make it unsuitable for indoor environments. [0002] Utilizing existing WiFi or Bluetooth wireless communication infrastructure to provide indoor positioning services has been proposed. While WiFi-based positioning solutions can be deployed and used at relatively low cost, they only provide accuracy up to a few meters due to wireless channel dynamics, fading, interference, and environmental noise. For example, complex indoor environmen...

Claims

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Application Information

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IPC IPC(8): G01S5/16
CPCG01C21/20G01S5/16G01S1/7034G01S1/7038G01B11/14G01C3/08G01S1/70H05B47/105
Inventor 沈国斌李立群赵峰
Owner MICROSOFT TECH LICENSING LLC
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